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[Openvpn-users] Unexpected WARNINGS


  • Subject: [Openvpn-users] Unexpected WARNINGS
  • From: "Tiger Big" <vpn.mailist@xxxxxxxxx>
  • Date: Thu, 6 Dec 2007 16:43:07 +0800

Server Configuration (Linux):
−−−−−−−−−−−−−−−−−−
local xxx.xxx.org
port 8080
proto tcp-server
tls-server
dev tap0
cert X509/Server/server.crt
key X509/Server/server.key
dh X509/Server/dh1024.pem
ca X509/CA/ca.crt
ifconfig 192.168.10.11 255.255.255.0
keepalive 10 120
user nobody
group nobody
persist-key
persist-tun
comp-lzo
verb 4
mute 10
−−−−−−−−−−−−−−−−−−


Client Configuration (WinXP):
------------------------------------------
local abc
remote xxx.xxx.org 8080
proto tcp-client
tls-client
dev tap
dev-node tap0
nobind
cert D:\\OpenVPN\\easy-rsa\\keys\\Tiger.crt
key D:\\OpenVPN\\easy-rsa\\keys\\Tiger.key
ca D:\\OpenVPN\\easy-rsa\\keys\\ca.crt
ifconfig 192.168.10.11 255.255.255.0
keepalive 10 120
comp-lzo
verb 4
mute 10
--------------------------------------------

Output of Server:
−−−−−−−−−−−−−−−−−−−−−−
Wed Nov  7 22:46:52 2007 us=395451 OpenVPN 2.0.9 mipsel-unknown-linux [SSL] [LZO] built on Oct  8 2007
Wed Nov  7 22:46:53 2007 us=139174 Diffie-Hellman initialized with 1024 bit key
Wed Nov  7 22:46:53 2007 us=167393 LZO compression initialized
Wed Nov  7 22:46:53 2007 us=177324 Control Channel MTU parms [ L:1576 D:140 EF:40 EB:0 ET:0 EL:0 ]
Wed Nov  7 22:46:53 2007 us=207122 TUN/TAP device tap0 opened
Wed Nov  7 22:46:53 2007 us=209204 TUN/TAP TX queue length set to 100
Wed Nov  7 22:46:53 2007 us=211730 /sbin/ifconfig tap0 192.168.10.11 netmask 255.255.255.0 mtu 1500 broadcast 192.168.10.255
Wed Nov  7 22:46:53 2007 us=276813 Data Channel MTU parms [ L:1576 D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ]
Wed Nov  7 22:46:53 2007 us=278702 GID set to nobody
Wed Nov  7 22:46:53 2007 us=279692 UID set to nobody
Wed Nov  7 22:46:53 2007 us=280933 Listening for incoming TCP connection on 123.45.67.89:8080
Wed Nov  7 22:47:00 2007 us=344674 TCP connection established with 98.76.54.32:48883
Wed Nov  7 22:47:00 2007 us=345622 Socket Buffers: R=[43689->65534] S=[16384->65534]
Wed Nov  7 22:47:00 2007 us=346587 TCPv4_SERVER link local (bound): 123.45.67.89:8080
Wed Nov  7 22:47:00 2007 us=347462 TCPv4_SERVER link remote: 98.76.54.32:48883
Wed Nov  7 22:47:00 2007 us=354161 TLS: Initial packet from 98.76.54.32:48883, sid=2e4d871b 12ba58ca
Wed Nov  7 22:47:02 2007 us=930794 VERIFY OK: depth=1, /C=CN/ST=SH/L=SH/O=Company/OU=Building_3_/CN=WR850G/Email=xxx@xxxxxxx
Wed Nov  7 22:47:02 2007 us=953126 VERIFY OK: depth=0, /C=CN/ST=SH/O=Company/OU=Building_3_/CN=Tiger/Email= xxx@xxxxxxx
Wed Nov  7 22:47:04 2007 us=189347 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Wed Nov  7 22:47:04 2007 us=192065 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed Nov  7 22:47:04 2007 us=196237 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Wed Nov  7 22:47:04 2007 us=198498 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed Nov  7 22:47:04 2007 us=388832 Control Channel: TLSv1, cipher TLSv1/SSLv3 EDH-RSA-DES-CBC3-SHA, 1024 bit RSA
Wed Nov  7 22:47:04 2007 us=392021 [Tiger] Peer Connection Initiated with 98.76.54.32:48883
Wed Nov  7 22:47:05 2007 us=629230 Initialization Sequence Completed
−−−−−−−−−−−−−−−−−−−−−−

Output of Client:
-----------------------------------------------------
Thu Nov 08 14:46:58 2007 us=24485 Current Parameter Settings:
Thu Nov 08 14:46:58 2007 us=24531   config = 'client.ovpn'
Thu Nov 08 14:46:58 2007 us=24541   mode = 0
Thu Nov 08 14:46:58 2007 us=24552   show_ciphers = DISABLED
Thu Nov 08 14:46:58 2007 us=24562   show_digests = DISABLED
Thu Nov 08 14:46:58 2007 us=24572   show_engines = DISABLED
Thu Nov 08 14:46:58 2007 us=24582   genkey = DISABLED
Thu Nov 08 14:46:58 2007 us=24593   key_pass_file = '[UNDEF]'
Thu Nov 08 14:46:58 2007 us=24603   show_tls_ciphers = DISABLED
Thu Nov 08 14:46:58 2007 us=24614   proto = 2
Thu Nov 08 14:46:58 2007 us=24624 NOTE: --mute triggered...
Thu Nov 08 14:46:58 2007 us=24651 188 variation(s) on previous 10 message(s) suppressed by --mute
Thu Nov 08 14:46:58 2007 us=24666 OpenVPN 2.0.9 Win32-MinGW [SSL] [LZO] built on Oct  1 2006
Thu Nov 08 14:46:58 2007 us=24748 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA.  OpenVPN 2.0-beta16 and earlier used 5000 as the default port.
Thu Nov 08 14:46:58 2007 us=24763 WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.
Thu Nov 08 14:46:58 2007 us=26495 LZO compression initialized
Thu Nov 08 14:46:58 2007 us=26589 Control Channel MTU parms [ L:1576 D:140 EF:40 EB:0 ET:0 EL:0 ]
Thu Nov 08 14:46:58 2007 us=46092 TAP-WIN32 device [tap0] opened: \\.\Global\{B45A907D-B030-4F6F-9FE1-001F6C3AEB48}.tap
Thu Nov 08 14:46:58 2007 us=46122 TAP-Win32 Driver Version 8.4
Thu Nov 08 14:46:58 2007 us=46135 TAP-Win32 MTU=1500
Thu Nov 08 14:46:58 2007 us=46156 Notified TAP-Win32 driver to set a DHCP IP/netmask of 192.168.10.11/255.255.255.0 on interface {B45A907D-B030-4F6F-9FE1-001F6C3AEB48} [DHCP-serv: 192.168.10.0, lease-time: 31536000]
Thu Nov 08 14:46:58 2007 us=53796 Successful ARP Flush on interface [3] {B45A907D-B030-4F6F-9FE1-001F6C3AEB48}
Thu Nov 08 14:46:58 2007 us=55539 Data Channel MTU parms [ L:1576 D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ]
Thu Nov 08 14:46:58 2007 us=55586 Local Options String: 'V4,dev-type tap,link-mtu 1576,tun-mtu 1532,proto TCPv4_CLIENT,ifconfig 192.168.10.0 255.255.255.0,comp-lzo,cipher BF-CBC,auth SHA1,keysize 128,key-method 2,tls-client'
Thu Nov 08 14:46:58 2007 us=55602 Expected Remote Options String: 'V4,dev-type tap,link-mtu 1576,tun-mtu 1532,proto TCPv4_SERVER,ifconfig 192.168.10.0 255.255.255.0,comp-lzo,cipher BF-CBC,auth SHA1,keysize 128,key-method 2,tls-server'
Thu Nov 08 14:46:58 2007 us=55634 Local Options hash (VER=V4): '1b763cc3'
Thu Nov 08 14:46:58 2007 us=55652 Expected Remote Options hash (VER=V4): '2f5a5592'
Thu Nov 08 14:46:58 2007 us=55680 Attempting to establish TCP connection with 127.0.0.1:3128
Thu Nov 08 14:46:58 2007 us=63009 TCP connection established with 127.0.0.1:3128
Thu Nov 08 14:46:58 2007 us=63039 Send to HTTP proxy: 'CONNECT xxx.xxx.org:8080 HTTP/1.0'
Thu Nov 08 14:46:59 2007 us=159521 HTTP proxy returned: 'HTTP/1.1 200 Connection established'
Thu Nov 08 14:47:01 2007 us=158850 Socket Buffers: R=[8192->8192] S=[8192->8192]
Thu Nov 08 14:47:01 2007 us=159020 TCPv4_CLIENT link local: 172.24.201.50
Thu Nov 08 14:47:01 2007 us=159037 TCPv4_CLIENT link remote: 127.0.0.1:3128
Thu Nov 08 14:47:01 2007 us=390961 TLS: Initial packet from 127.0.0.1:3128, sid=9696962b 6944c74a
Thu Nov 08 14:47:03 2007 us=206615 VERIFY OK: depth=1, /C=CN/ST=SH/L=SH/O=Company/OU=Building_3_/CN=WR850G/emailAddress= xxx@xxxxxxx
Thu Nov 08 14:47:03 2007 us=208774 VERIFY OK: depth=0, /C=CN/ST=SH/O=Company/OU=Building_3_/CN=Server/emailAddress=xxx@xxxxxxx
Thu Nov 08 14:47:05 2007 us=389449 NOTE: Options consistency check may be skewed by version differences
Thu Nov 08 14:47:05 2007 us=389494 WARNING: 'version' is used inconsistently, local='version V4', remote='version V0 UNDEF'
Thu Nov 08 14:47:05 2007 us=389513 WARNING: 'dev-type' is present in local config but missing in remote config, local='dev-type tap'
Thu Nov 08 14:47:05 2007 us=389531 WARNING: 'link-mtu' is present in local config but missing in remote config, local='link-mtu 1576'
Thu Nov 08 14:47:05 2007 us=389549 WARNING: 'tun-mtu' is present in local config but missing in remote config, local='tun-mtu 1532'
Thu Nov 08 14:47:05 2007 us=389571 WARNING: 'proto' is present in local config but missing in remote config, local='proto TCPv4_SERVER'
Thu Nov 08 14:47:05 2007 us=389607 WARNING: 'ifconfig' is present in local config but missing in remote config, local='ifconfig 192.168.10.0 255.255.255.0'
Thu Nov 08 14:47:05 2007 us=389625 WARNING: 'comp-lzo' is present in local config but missing in remote config, local='comp-lzo'
Thu Nov 08 14:47:05 2007 us=389643 WARNING: 'cipher' is present in local config but missing in remote config, local='cipher BF-CBC'
Thu Nov 08 14:47:05 2007 us=389659 WARNING: 'auth' is present in local config but missing in remote config, local='auth SHA1'
Thu Nov 08 14:47:05 2007 us=389673 NOTE: --mute triggered...
Thu Nov 08 14:47:05 2007 us=389977 3 variation(s) on previous 10 message(s) suppressed by --mute
Thu Nov 08 14:47:05 2007 us=389991 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Thu Nov 08 14:47:05 2007 us=390009 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Thu Nov 08 14:47:05 2007 us=390090 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Thu Nov 08 14:47:05 2007 us=390106 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Thu Nov 08 14:47:05 2007 us=390453 Control Channel: TLSv1, cipher TLSv1/SSLv3 EDH-RSA-DES-CBC3-SHA, 1024 bit RSA
Thu Nov 08 14:47:05 2007 us=390487 [Server] Peer Connection Initiated with 127.0.0.1:3128
Thu Nov 08 14:47:06 2007 us=630508 TEST ROUTES: 0/0 succeeded len=-1 ret=1 a=0 u/d=up
Thu Nov 08 14:47:06 2007 us=630535 Initialization Sequence Completed
----------------------------------------------------------


Why there're so many WARNINGS:

1.Both client and server use same version - 2.0.9,why does the client say: "NOTE: Options consistency check may be skewed by version differences"
2.Many options (like 'comp-lzo')  have been enabled in both client and server's configuration, why does client say " WARNING: 'comp-lzo' is present in local config but missing in remote config, local='comp-lzo'"?